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Harvesting is an initial upgrade which allows woodcutters to produce/obtain herbs, a basic resource. To unlock it, 10 herbs are needed, which can be obtained by clicking the 'Cut Wood' button. Once unlocked, the upgrade takes place automatically.
|Initial||Skinning • Harvesting • Prospecting • Masonry|
|Masonry||Domestication • Ploughshares • Irrigation – Construction • Granaries • Basic Weaponry • Basic Shields – Horseback Riding • The Wheel – Writing|
|Construction||Butchering • Gardening • Extraction – Architecture – Tenements • Palisade|
|Architecture||Flensing • Macerating – Crop Rotation • Selective Breeding • Fertilisers – Slums – Civil Service – Start Building Wonder|
|Writing||Administration • Code of Laws • Mathematics • Aesthetics|
|Civil Service||Feudalism • Guilds • Serfs • Nationalism|
|Trade||Trade • Currency • Commerce|